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The mechanisms for oncogenesis induced by HTLV-1-mediated modulation of cytokine signaling

Research Project

Project/Area Number 20K22904
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0902:General internal medicine and related fields
Research InstitutionKumamoto University

Principal Investigator

Higuchi Yusuke  熊本大学, 病院, 助教 (80882141)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsHTLV-1 / HBZ / IL-10 / STAT3 / HTV-1 / STAT1
Outline of Research at the Start

HTLV-1がコードするHTLV-1 bZIP factor (HBZ)は、HTLV-1関連脊髄症などの慢性炎症性疾患や成人T細胞白血病 (ATL) の発症に重要である。先行研究では、HBZが抑制性サイトカインIL-10の産生を促進すると共に、IL-10の下流にあるSTAT分子と核内で結合し、そのシグナル伝達経路を攪乱し、結果としてIL-10の刺激下にCD4陽性T細胞の増殖を促進することを見出した。本課題では、HBZがIL-10-JAK-STATシグナル経路に作用しCD4陽性T細胞の増殖を促進する分子機構を解析し、HTLV-1の発がん機構の解明、新規治療の開発に繋げる。

Outline of Final Research Achievements

The STAT3 D661Y mutation is frequently found in ATL cases. It was found that the STAT3 D661Y mutation binds more tightly to HBZ than wild-type STAT3. Luciferase reporter assays using SIE consensus sequence and TRE consensus sequence showed that HBZ activates not only the JAK-STAT signaling pathway but also the TGF-β signaling pathway under the coexpression of STAT3 D661Y mutant.
On the other hand, analysis of IL-10 knockout mice revealed that HBZ transgenic/IL-10 knockout mice show signs of pain and disease, such as low body weight, reduced activity, and disturbed fur, leading to early death.

Academic Significance and Societal Importance of the Research Achievements

STAT3の変異はHTLV-1キャリアやATL症例に多く見られる変異の1つである。本研究ではSTAT3変異のHBZ病原性発現における意義を解析した。本研究で得られた知見は、HTLV-1病原性発現機構の解明に寄与できるものと考える。また、HBZ病原性発現にIL-10が与える影響について、生体を用いた研究を行った。これらのマウスの解析を進めることで、ATLの発症予測やATLに対する新規治療法の開発に繋がるものと考える。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2022 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (2 results)

  • [Journal Article] HTLV-1's Foxy Strategy for Survival and Transmission2022

    • Author(s)
      Higuchi Yusuke、Yasunaga Jun-ichirou、Matsuoka Masao
    • Journal Title

      Frontiers in Virology

      Volume: 1

    • DOI

      10.3389/fviro.2021.792659

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Predictive impact of soluble interleukin‐2 receptor and number of extranodal sites for identification of patients at very high risk of CNS relapse in diffuse large B‐cell lymphoma2022

    • Author(s)
      Shichijo Takafumi、Tatetsu Hiro、Nosaka Kisato、Higuchi Yusuke、Kikukawa Yoshitaka、Inoue Yoshitaka、Toyoda Kosuke、Yasunaga Jun‐ichirou、Matsuoka Masao
    • Journal Title

      eJHaem

      Volume: - Issue: 2 Pages: 385-393

    • DOI

      10.1002/jha2.393

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] HTLV-1 induces T cell malignancy and inflammation by viral antisense factor-mediated modulation of the cytokine signaling2020

    • Author(s)
      Higuchi Yusuke、Yasunaga Jun-ichirou、Mitagami Yu、Tsukamoto Hirotake、Nakashima Kazutaka、Ohshima Koichi、Matsuoka Masao
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 117 Issue: 24 Pages: 13740-13749

    • DOI

      10.1073/pnas.1922884117

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Safety and pharmacokinetics of polatuzumab vedotin in Japanese patients with relapsed/refractory B-cell non-Hodgkin lymphoma: a phase 1 dose-escalation study2020

    • Author(s)
      Kinoshita Tomohiro、Hatake Kiyohiko、Yamamoto Kazuhito、Higuchi Yusuke、Murakami Satsuki、Terui Yasuhito、Yokoyama Masahiro、Maruyama Dai、Makita Shinichi、Hida Yukari、Saito Tomohisa、Tobinai Kensei
    • Journal Title

      Japanese Journal of Clinical Oncology

      Volume: 51 Issue: 1 Pages: 70-77

    • DOI

      10.1093/jjco/hyaa169

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] HBZはSTAT1/3との結合を介して,IL-10/JAK/STATシグナル経路を変調させる2020

    • Author(s)
      樋口 悠介, 安永 純一朗, 三田上 侑, 大島 孝一, 松岡 雅雄
    • Organizer
      第82回日本血液学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] HTLV-1関連疾患におけるプロウイルス構造と宿主免疫の違い2020

    • Author(s)
      山田 麻美, 七條 敬文, 樋口 悠介, 安永 純一朗, 野坂 生郷, 松岡 雅雄, 中川 正法
    • Organizer
      第82回日本血液学会学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-09-29   Modified: 2023-01-30  

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